#include<bits/stdc++.h>
#define ll long long
#define ull unsigned long long
using namespace std;

const int N = 1e6 + 10, INF = 0x3f3f3f3f;

int n, st, ed;
int a[N];

void solve()
{
    cin >> st >> n;
    for (int i = 1;i <= n;i++) cin >> a[i];
    cin >> ed;
    int cnt = 0;
    for (int i = 1;i <= n;i++) if (a[i] < ed) cnt++;
    cout << ed - st + 1 - cnt << '\n';
}

signed main()
{
    // ios::sync_with_stdio(0);
    // cin.tie(0);cout.tie(0);
#define ONLINE_JUDGE
#ifndef ONLINE_JUDGE
    std::istringstream in(R"()");
    std::cin.rdbuf(in.rdbuf());
#endif
    int T = 1;
    cin >> T;
    for (int i = 1;i <= T;i++) {
        solve();
    }
}